1. A less harsh word for
fuckwit, dick, idiot, and all other offensive terms refering to someone who is being
silly.
It is also a less serious term, therefore sounding less offensive, and because of the ridiculous sound of the word, it can be taken more lightly.
2. Can be used to refer to the male's genital
E.g.
1
Boy "Did you know I can skull a whole
sack of goon in five minutes?"
Girl "That's not even
cool, you nonger!"
E.g. 2
Girl "Did you see how big his nonger was?"